Smyrna, Delaware · field elev 18 ft
Density Altitude at Smyrna (38N)
Smyrna sits at 18 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 1,819 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 36.0 | −1,517 ft | 44.4 | −938 ft |
| February | 38.2 | −1,364 ft | 47.4 | −734 ft |
| March | 45.0 | −897 ft | 54.5 | −257 ft |
| April | 55.5 | −191 ft | 66.0 | 498 ft |
| May | 64.4 | 394 ft | 74.4 | 1,036 ft |
| June | 73.2 | 960 ft | 82.7 | 1,558 ft |
| July | 77.9 | 1,258 ft | 86.9 | 1,819 ft |
| August | 76.2 | 1,150 ft | 85.1 | 1,707 ft |
| September | 70.1 | 762 ft | 79.2 | 1,339 ft |
| October | 59.2 | 54 ft | 68.9 | 685 ft |
| November | 48.7 | −646 ft | 58.0 | −26 ft |
| December | 40.3 | −1,219 ft | 48.6 | −653 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for 38N
DENSITY ALTITUDE
Field elevation 18 ft — the air behaves like 1,825 ft.
- PRESSURE ALT
- 19 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby Delaware fields
- 33N — Delaware Airpark
Dover/Cheswold · elev 55 ft
- 0N4 — Chandelle
Dover · elev 22 ft
- 15N — Jenkins
Wyoming · elev 53 ft
- KDOV — Dover AFB
Dover · elev 29 ft
- KEVY — Summit
Middletown · elev 70 ft
- KILG — New Castle
Wilmington · elev 80 ft
- D74 — Chorman
Farmington · elev 65 ft
- KGED — Delaware Coastal
Georgetown · elev 53 ft
Frequently asked questions
How high does density altitude get at 38N in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Smyrna reaches roughly 1,819 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at 38N on an average day?
It swings with the seasons: from roughly −1,517 ft at the coldest month's average temperature to about 1,258 ft at the warmest month's — all from a constant field elevation of 18 ft. The month-by-month table above carries the full year.
What is the field elevation of Smyrna?
18 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 38N (FAA), in Smyrna, Delaware.